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Baffle
Tab
11.0
Servicing the Boiler
Spring Clip
11.1
Annual Servicing (Cont)
11. Remove the spring clips retaining the air box
side baffle plates. Disengage the tabs on the
baffles from the slots in the fan hood (Fig. 42).
12. Undo the screws securing the fan hood to the
appliance back panel, and draw the fan and hood
Fig. 42
assembly forwards.
Fan and Hood
Assembly
13. Draw the burner out of the combustion box,
pulling the electrode grommets from the slots in
the combustion box lower panel (Fig. 43).
14. Disconnect the electrode leads and grommets
from the electrodes. Completely remove the
burner (Fig. 43).
15. Brush any deposits from the injectors. Do not
use a pin or wire to clean them.
16. Brush the burner blades and venturis and
clean the combustion box.
17. Ensure that the heat exchanger fins are clear
of any obstruction.
Electrode
DHW Filter (Fig. 45)
Grommets
18. If the flow of domestic hot water is diminished,
it may be necessary to clean the filter.
19. Initially check the cold water inlet tap filter.
Threaded
20. Turn the tap off. Undo the blanking cap and
Bush
remove the threaded bush (Fig. 44).
21. Extract the filter and rinse thoroughly in clean
water. Reassemble and check the flow. If
Burner
required clean the manifold filter as described
Fig. 43
below.
Electrode
Leads
22. Undo the filter cartridge from the inlet/return
manifold.
Blanking
Cold Water
23. Dismantle the cartridge and carefully remove
Cap
Inlet Tap
the flow regulator and filter gauze. Rinse them
Fig. 44
thoroughly in clean water and reassemble in
reverse order.
24. Check that the pressure vessel charge is
0.5bar and reassemble in reverse order of
Cartridge
dismantling.
Body
Filter Gauze
25. Turn the selector switch fully anticlockwise
against the spring pressure to position R and hold
for 2 seconds to reset the boiler before
recommissioning.
Flow
Regulator
26. Complete the relevant section of the
Venturi
"Benchmark" Installation, Commissioning and
Fig. 45
Inlet/Return Manifold
Service Record Log Book and hand it back to the
user.
27
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